90124728 has 16 divisors (see below), whose sum is σ = 225311880. Its totient is φ = 30041568.

The previous prime is 90124717. The next prime is 90124729. The reversal of 90124728 is 82742109.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90124729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877575 + ... + 1877622.

Almost surely, 2^90124728 is an apocalyptic number.

It is an amenable number.

90124728 is an abundant number, since it is smaller than the sum of its proper divisors (135187152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90124728 is a wasteful number, since it uses less digits than its factorization.

90124728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755206 (or 3755202 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 90124728 is about 9493.4044472992. The cubic root of 90124728 is about 448.3474000767.

The spelling of 90124728 in words is "ninety million, one hundred twenty-four thousand, seven hundred twenty-eight".